[treyfitty]

For what it's worth, I sometimes hit the minimum tip percentage solely because a colleague at work is with me. The "impulse" to hit that button is greater if that colleague is my boss. But, even when I'm surrounded by strangers, I still feel this need to hit the tip button.

Ultimately, I think right now the social expectation of tipping in this situation is in limbo- whether you do or don't, it's ok.